A sudden termination of the virtual desktop session occurs when the user moves one application window around, in particular to the upper border of the window. This occurs with a dual monitor setup, fullscreen on all monitors and resize remote display.

The backtrace of nxnode.bin reports:

Thread 1 (Thread 0x7a9353e006c0 (LWP 20408)):
#0  __memcmp_avx2_movbe () at ../sysdeps/x86_64/multiarch/memcmp-avx2-movbe.S:456
#1  0x00007a938726452b in SameXCoordinateCompare(void*, void*, int, int, int) () at /usr/NX/lib/libnxcim.so
#2  0x00007a9387264750 in CheckOffset () at /usr/NX/lib/libnxcim.so
#3  0x00007a938e8a39c4 in nxagentGetCopiedRectangles () at /usr/NX/lib/libnxdiag.so
#4  0x00007a938e8ad6a5 in ??? () at /usr/NX/lib/libnxdiag.so
#5  0x00007a938c6756d4 in ??? () at /usr/NX/lib/libnxc.so
#6  0x00007a938de9ca94 in start_thread (arg=<optimised out>) at ./nptl/pthread_create.c:447
#7  0x00007a938df29c3c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78